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将牛心坨地区中生界火山岩储层的储集空间类型划分为两类,即原生储集空间和次生储集空间。原生储集空间包括气孔、角砾间孔、炸裂缝、冷凝收缩缝等。次生储集空间可以分为溶蚀孔、缝和构造裂缝。运用压汞资料和铸体资料分析了孔、喉结构;通过对坨33块钻井岩心直接观察和薄片鉴定分析,认为裂缝主要有构造裂缝、收缩缝、溶蚀缝3种,其中以构造裂缝、溶蚀缝为主。坨33块的裂缝产状以网状裂缝为主、水平裂缝为辅。最后考虑本区火山岩的形成和演化,对坨33块火山岩的储集空间分为5个阶段进行了分析。
The types of reservoir space of Mesozoic volcanic reservoirs in Niuxintuo area are divided into two types, that is, primary reservoir space and secondary reservoir space. The primary reservoir space includes pores, brecciated pores, burst cracks, condensation and shrinkage cracks. Secondary reservoir space can be divided into dissolution holes, cracks and structural cracks. According to the data of the mercury intrusion and the material of the casting, the pore and the throat structure were analyzed. Through the direct observation and thin-plate identification analysis of the 33 drilling cores in Tuo Tuo, there are mainly three types of structural cracks, shrinkage cracks and dissolution cracks. Among them, Mainly. Lump lumps of 33 crack-shaped mesh-based fractures, supplemented by horizontal cracks. Finally, considering the formation and evolution of volcanic rocks in this area, the reservoir space of the 33 volcanic rocks in Tuo Tuo is divided into five stages.